Determining random lasing action

R Sapienza - Nature Reviews Physics, 2019 - nature.com
Random lasing—for which disorder is exploited to enhance stimulated emission—has
emerged as a paradigmatic phenomenon of complex lasers. Random lasers feature unique …

Localized modes revealed in random lasers

B Kumar, R Homri, Priyanka, SK Maurya, M Lebental… - Optica, 2021 - opg.optica.org
In sufficiently strong scattering media, light transport is suppressed and modes are
exponentially localized. Anderson-like localized states have long been recognized as …

Optical Thouless conductance and level-spacing statistics in two-dimensional Anderson localizing systems

S Mondal, R Kumar, M Kamp, S Mujumdar - Physical Review B, 2019 - APS
We experimentally investigate spectral statistics in Anderson localization in two-dimensional
amorphous disordered media. Intensity distributions captured over an ultrabroad …

On chip random lasing performance of the acceptor dye in a specially designed linear and zig zag array of microdroplets with intrinsic disorder

A Sundaresan, S Nuchikkat, KS Alee - Scientific Reports, 2022 - nature.com
We demonstrate high-quality on chip random lasing of the acceptor dye using a specially
designed dynamic linear array of microdroplets with unconventional shapes that do not …

Necklace-state-mediated anomalous enhancement of transport in Anderson-localized non-Hermitian hybrid systems

M Balasubrahmaniyam, S Mondal, S Mujumdar - Physical review letters, 2020 - APS
Non-Hermiticity is known to manifest interesting modifications in the transport properties of
complex systems. We report an intriguing regime of transport of hybrid quasiparticles in a …

Random-laser dynamics with temporally modulated pump

S Bittner, S Knitter, SF Liew, H Cao - Physical Review A, 2019 - APS
We present an experimental study of the effects of temporal modulation of the pump intensity
on a random laser. The nanosecond pump pulses exhibit rapid intensity fluctuations which …

Statistics of Lyapunov exponent in random Fibonacci multilayer

P Falcone, L Moretti - Journal of Optics, 2024 - iopscience.iop.org
We numerically investigated the localization properties of band-gap and band-edge modes
in a one-dimensional random Fibonacci optical multilayer. The statistics of the Lyapunov …

Anomalous localization and transport behavior of amplifying periodic-on-average random systems at critical disorder

K Joshi, R Kumar, S Mujumdar - Physical Review A, 2022 - APS
Optical amplification in a disordered system leads to modification of the localization
properties and the relative fluctuations of transport parameters. Here, we study the effect of …

Direct experimental determination of critical disorder in one-dimensional weakly disordered photonic crystals

M Balasubrahmaniyam, S Mujumdar - Physical Review B, 2018 - APS
We report experimental measurements of critical disorder in weakly disordered, one-
dimensional photonic crystals. We measure the configurationally averaged transmission at …

Anderson localization at the hybridization gap in a plasmonic system

M Balasubrahmaniyam, A Nahata, S Mujumdar - Physical Review B, 2018 - APS
Disorder-induced Anderson localization in quasiparticle transport is a challenging problem
to address, even more so in the presence of dissipation, as the symptoms of disorder …